G

Gourav • 1.45K Points
Master

Q. Which of the following is equal to cos²θ − sin²θ?

  • (A) cos 2θ
  • (B) sin 2θ
  • (C) tan 2θ
  • (D) sec 2θ

Explanation by: Gourav

cos 2θ = cos²θ − sin²θ.

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